-germination models in predicting germination-time under constant-temperature conditions. Of specific interest was the assessment of shape …-shape assumptions. All models were relatively accurate in the sub-optimal temperature range except in the 3 °C treatment where predicted … germination times were in error by as much as 70 d for the cardinal-temperature models. CONCLUSIONS: Germination model selection …

Since the pioneering work of Koenker and Bassett (1978), econometric models involving median and quantile rather than … the classical mean or conditional mean concepts have attracted much interest.Contrary to the traditional models where the … noise is assumed to have mean zero, median-restricted models enjoy a rich group-invariance structure.In this paper, we …